start-ver=1.4
cd-journal=joma
no-vol=105
cd-vols=
no-issue=
article-no=
start-page=7
end-page=15
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2016
dt-pub=20160201
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=ͺqβ`wIθ@πp’½νͺiνΜ½l«Ζͺή
kn-title=Molecular-based analysis of genetic diversity and classification of Japanese melon breeding lines
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=For the breeding of Japanese netted melon, various types of foreign cultivars have been utilized for improving adaptability, disease and pest resistance, fruit quality and so on. However, little is known about their genetic diversity and relationships, since most cultivars derived from crosses between various horticultural groups. To figure out the genetic structure of Japanese melon, in this study, 57 melon accessions from three horticultural groups were examined using 55 RAPD markers produced by 24 RAPD primers. Genetic diversity of the Japanese netted melon was as high as those of cultivar groups of Groups Cantalupensis and Inodorus, while it was low in Group Conomon irrespective of large variations in fruit traits. Cluster analysis and PCO analysis based on genetic distance showed that Group Conomon was distantly related to other melon accessions. Among the latter, European cantaloupe (nonnetted) and American open-field type (netted) proved to be genetically close, while England glasshouse melon (netted) including eEarlfs Favouritef is distantly related to these two groups and closely related with Group Inodorus. It was therefore suggested that England glasshouse type was established from hybrids between European cantaloupe and Group Inodorus. Japanese netted melon was most closely related with England glasshouse type, irrespective of the fact that various kinds of melon accessions have been crossed to improve adaptability, disease resistance and so on. In contrast, pure line cultivars of the Japanese netted melon bred by pure line selection from eEarl's Favouritef or by crossing eEarlfs Favouritef with eBritish Queenf were confirmed to be mostly homogenous, and it was difficult to establish RAPD markers to discriminate each cultivar. Group Conomon var. makuwa and var. conomon, which have been cultivated and utilized as different crops, proved to be genetically indistinguishable and were considered to share the same gene pool.
en-copyright=
kn-copyright=
en-aut-name=DungTran Phuong
en-aut-sei=Dung
en-aut-mei=Tran Phuong
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=TanakaKatsunori
en-aut-sei=Tanaka
en-aut-mei=Katsunori
kn-aut-name=cT
kn-aut-sei=c
kn-aut-mei=T
aut-affil-num=2
ORCID=
en-aut-name=AkashiYukari
en-aut-sei=Akashi
en-aut-mei=Yukari
kn-aut-name=ΎΞR
kn-aut-sei=ΎΞ
kn-aut-mei=R
aut-affil-num=3
ORCID=
en-aut-name=ThuyDuong Thanh
en-aut-sei=Thuy
en-aut-mei=Duong Thanh
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=NishidaHidetaka
en-aut-sei=Nishida
en-aut-mei=Hidetaka
kn-aut-name=Όcp²
kn-aut-sei=Όc
kn-aut-mei=p²
aut-affil-num=5
ORCID=
en-aut-name=KatoKenji
en-aut-sei=Kato
en-aut-mei=Kenji
kn-aut-name=Α‘i
kn-aut-sei=Α‘
kn-aut-mei=i
aut-affil-num=6
ORCID=
affil-num=1
en-affil=
kn-affil=ͺRεwΒ«Ά½Θw€Θ
affil-num=2
en-affil=
kn-affil=OOεwlΆw
affil-num=3
en-affil=
kn-affil=ͺRεwΒ«Ά½Θw€Θ
affil-num=4
en-affil=
kn-affil=ͺRεwΒ«Ά½Θw€Θ
affil-num=5
en-affil=
kn-affil=ͺRεwΒ«Ά½Θw€Θ
affil-num=6
en-affil=
kn-affil=ͺRεwΒ«Ά½Θw€Θ
en-keyword=breeding
kn-keyword=breeding
en-keyword=classification
kn-keyword=classification
en-keyword=genetic diversity
kn-keyword=genetic diversity
en-keyword=melon
kn-keyword=melon
en-keyword=RAPD
kn-keyword=RAPD
END
start-ver=1.4
cd-journal=joma
no-vol=94
cd-vols=
no-issue=1
article-no=
start-page=47
end-page=55
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2005
dt-pub=20050201
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=Effects of Heading-time Genes on Pre-flowering Developmental Phases in Rice
kn-title=Cloδϊβ`qΜJΤOΆηΙyΪ·ψΚΜπΝ
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Sixteen heading-time tester lines in rice (Oryza Sativa L.) for the six loci were subjected to transfer treatments from short (10-h) to long photoperiod(24-h) and vice versa at various times. Using an analytical model, we estimated seven parameters for the three pre-flowering developmental phases of each line: the basic vegetative phase (BVP), the subsequent photoperiod-sensitive phase (PSP), and the post photoperiod-sensitive phase until heading (PPP). The Sel locus was found to have an extrremely strong effect on PSP; Ef1, a slight effect on BVP and a considerable effect on PPP; and E1, a considerable effect on PSP, although their effects were modified by nonallelic interactions at these three loci. The effects of three other loci were almost negligible. Subsequently, two late-heading mutant lines HS169 and HS276 with an extremely long basic vegetative growth (BVG; days to heading under short photoperiod) period conferred by a recessive mutant gene ef1-h and a novel gene ef2, were subjected to photoperiodic transfer treatments. Both mutant genes were found to increase BVP and PPP markedly by themselves, whereas ef1 required nonallelic interaction with the Se1 locus. Based on the results, causal genetic pathways to flowering in rice and the significance of ef1-h and ef2 in recent rice breeding in the low latitudes were discussed.
en-copyright=
kn-copyright=
en-aut-name=NishidaHidetaka
en-aut-sei=Nishida
en-aut-mei=Hidetaka
kn-aut-name=Όcp²
kn-aut-sei=Όc
kn-aut-mei=p²
aut-affil-num=1
ORCID=
affil-num=1
en-affil=
kn-affil=ͺRεw
en-keyword=rice
kn-keyword=rice
en-keyword=pre-flowering
kn-keyword=pre-flowering
en-keyword=developmental phase
kn-keyword=developmental phase
en-keyword=BVP
kn-keyword=BVP
en-keyword=PSP
kn-keyword=PSP
en-keyword=PPP
kn-keyword=PPP
END